 		function tijiao() {
			var datatype = document.getElementById("datatype");
			var databox = document.getElementById("databox");
			var val = datatype.value;
			switch(val) {
				case "0":
					appellation();
					break;
				case "1":
					tel();
					break;
				case "2":
					mail();
					break;
				case "3":
					caron();
					break;
				case "4":
					randnum();
					break;
				default:
					
					break;
			}
		}
 